Automatic ejection device for die-casting machines



Aug. 25, 1925. 1,550,561

A. ANDERSON UTOMATIC EJECTION DEVICE FOR DEE CASTING MACHINES Filed Feb; 5, 1923 3 Sheets-Sheet 1 do N v [Tn m\ a. lT'fl [U1 F n I m A ALEX ANDERSON INVENTOR.

% ATTORNEY.

Ail 25, 1925.

A. ANDERSON AUTOMATIC EJECTION DEVICE FOR DIE CASTING MACHINES Filed Feb. 5, 1923 3 Sheets-Sheet 2 LEX ANDERSON INVENTOR.

ATTORNEY. 0

Aug. 25, 1925. 15504563 A. ANDERSON AUTOMATIC EJECTION DEVICE FOR DIE CASTING MACHINES Filed Feb. 5, 1923 5 SheetsSheet '5 L l3 W41 We l J ALEX ANDERSON INVENTOR.

Patented Aug. 25, 1925 UNITED STATES.

ALEXANDER Annnnson, 'or DETROIT, MICHIGAN, ASSIGNOR T EARL HOLLEY, or

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' AUTOMATIC EJECTION DEVICE TOR DIE-CASTING MACHINES.

-Application filed February 5, 1923. Serial No. 617,042.

T 0 all whom it may concern:

Be it known that I, ALEXANDER ANnnnsoN, a citizen ofthe United States, residing at 9299 Cascade'Ave.,. Detroit, in'the county of 6 \Vayne andState of Miehi an, have invented a certain new and useful mprovements in Automatic Ejection Devices for Die-Casting Machines, of which the following is a speci fication.

This invention relates to "automatic ejection devices for die-casting machines of the typedescribed in the patent application Serial No. 504,988, appliedfor by D. Candler, October. 3, 1921'. This application '15 discloses an ejection-device adapted to beused 'with arotating molding machine, but

it is also particularly adapted to'be used with-stationary molding devices. v A .Figure I shows ctional elevation on the 220 plane X-'Y of'Figure'II; I I

Figure '11 shows a plan'view showing the ejectors in the position-they assume after the castings have been ejected, the broken line showing the position the mechanism is 2 in when the castings are being ejected.

Figure III shows in elevation the end view ofthe ejection device.

In these figures 26 represents a rotating.

table upon which -the whole device is arranged and 27 the stationary base upon which 26 revolves. 1 is the radially moreable inner mold and 2 is the stationary outer mold. 3 is the support and slide for the inner mold 1. 4 is the radially stationary support for the outer mold 2, radially locked to the rotating table 26 by means of the bolt 29. (Fig. I) 6 6 6 are the knock-out pins for the radially stationary outer mold 2. 7 is the slide which carries the knock-outs 5 5 5.

8 is the slide which moves the knock-outs 6 6 '6. 9 is the lever which moves the slide 7.

10 is the pin connecting the lever 9 to the I slide 7, the lever being slotted so as to 15 allow the slide 7 to move freely. This pin is provided with a nut so that it may be locked in place. 11 is the fulcrum for the lever 9 which consists of a bolt mounted on the mold support 4. 12 is a projecting arm integral with the'lever 9. 13 is a stationary roller supported from the stationary base 27 by means of the projecting bracket 28. The.- purposeot-thisroller 13 will be-described 25 is an adjustable stop limiting themovement of the slide 7 with reference to. the

stationary support 4 of the mold 2. 14 is a 'vided with a notch O'i'vhic Tengages with. .a corresponding projection 21' integral with] the support 3. a 22 is a bevel face at the ex. treme end of 19, 23 is a corresponding sta- 7 tionary projection which is integral with the base 26 of the molding machine. f24 is a spring "pressed plunger which presses the piece 19 into the-guidein the slotted projec-- tion 30, causing 19 to engage with the pro-. 7 jection 21 by means of the notch 20.

Operation: The knock-out-"- pin's in the moveable mold 1 are operated bye cam notshown in a manner similar to that described in the patent application of Candler referred to above. The novelty in this invention resides in the operation of the knock-outs 5 5 5 in unison with the motion of the mold 1 and its support 3. Whenthe mold 1 is moved in so as to touch' the mold '2 the support 3 and projection 30, engages with the lock-nuts 18 and carries the rod 17, lever 9 and slide 7 backwards so as to cause the slide 7 to contact with the stop '25, thus carrying the knock-outs 5 5 5 would enter .the molten metal unless this clearance was provided so that there are a --few seconds interval between the: opening 105 of the molds and the motionof the knockout pins 5 5 5.

The knockout; pins are thereupon tacts on its bevel face 22 with the stationary projection 23. This causes the spring 24 to be compressed and thereby allowing the piece 19 to move over to the left (on Figure II), the notch 20 thereby disengaging itself from the projection 21. p

The piece 19 is now free from the mold support 3, although supported in the guide 30, hence when the stationary roller 3 strikes the arm 12 the leverf9 is rotated about its stationary pin 11 and the slide 7' is moved to the right. The knock-outs 5 5- 5 and the lever 9 assume the position shown on Figure II in full lines, being carried back by reason of the resulting motion of the slide 7. The stop 25 prevents the knock-outs overrunning the position the roller 13 as they would tend to do under the influence of the inertia of the moving masses 7 and 5. The knock-outs are thus withdrawn and it is thus possible to inserta core in the mold if a core is needed inthe particular mold used.

IVhen the molds are closed the projection of the support 3 of the mold 1 again contacts with the lock-nuts 18. This merely makes sure that the. slide 7 is contacting with the stop 25. This recaution is necessary as if by accident t e knock-outs were left projecting even-slightly into the mold they would be welded into the casting because of their small size and the rapidity in which they would be heated up were they allowed to project into the path of the molten iron. I

What I claim is:

1. In a molding machine having matching molds consisting of a stationary mold and a moveable mold, knock-out pins in' the stationary mold, a slide upon whichsaid knockout pins are mounted, a lever pivotally connected to said slide, a stationary fulcrum for said lever, and a link connecting said lever to the moveable mold whereby as the molds are opened the knock-out pins are operated.

2. In a molding machine having matching molds consisting of a stationary mold and a moveable mold, knock-out pins in the stationary mold, a slide upon which said knockout pins are mounted, a lever pivotally con nected to said slide, a stationary fulcrum for said lever, a notched link adapted to connect said lever to the said moveable mold, a beveled surface at the end of said link, a correspon din g stationary beveled surface adapted to .contact withthe beveled surface on the end of said link whereby as the moveable mold is opened the connecting link is first determined by the location of moved with the moveable mold and is later disengaged from said moveable mold.

3. In a rotating molding machine having matching molds consisting of a radially stationary mold and a radially moveable mold, knock-out pins in the stationary mold, a slide upon which saidknock-out pins are mounted, a lever pivotally connected to said slide, a stationaryfulcrum and a projecting arm for said lever, a link connecting, saidlever to the said moveable mold, means for disengaging said link from said moveable mold, a stationary roller adapted to contact with said projecting arm of said lever whereby the knock-out pins are returned to theinoriginal position duringthe rotation of saldmoldin machine. i

4. In a mold ng machine having matching molds consisting of-a stationarymold and a moveable mold, knock-out pinsin the sta'-.

tionary mold, a slide uponlwhiehsaid knock out pins are mounted a lgver pivotally connected to said slide, a stationary fulcrum for said lever, a link connecting said lever to the said moveable mold,,an adjustable stop on said lever ad pt 'd to engage with said moveable mold, an a justable stop on'said slide for limiting the motion of said slide relative to said stationary mold.

.5. In a molding machine having matching molds consisting of a stationary mold and a moveable mold, knock-out pins in the stationary mold, a slide upon which said knockout pins are mounted, a lever pivotally connected to said slide, a stationary fulcrum for said lever, a link connecting said lever to the said moveable mold, a notch on said 1i adapted to engage with said moveable mold.

after said moveable mold has moved a-predetermined distance, an adjustable stop on said link adapted to engage with said moveable mold when salid mold is moved to the closed position whereby said knock-out pins are returned to their original position when the moveable moldis moved to. its closed position.

6. In a molding machine having matching molds consisting of a stationary mold'and a moveable mold, knock-out pins inthe stationary mold, a slide upon which said-knockout pins are mounted, a lever pivotally connected to said slide a stationary fulcrum ALEX ANDERSON.

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